Module: OpenGraph::Parser

Defined in:
lib/kog/parser.rb

Constant Summary collapse

REQUIRED_ATTRIBUTES =

Attributes that must be present according to the protocol

['image', 'title', 'type', 'url']

Class Method Summary collapse

Class Method Details

.parse(url) ⇒ Object

Parse



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# File 'lib/kog/parser.rb', line 10

def self.parse(url)
  # Get the document
  begin
    body = HTTParty.get(url).body
    doc = Nokogiri::HTML.parse(body)
  rescue HTTParty::ResponseError, HTTParty::UnsupportedURIScheme, HTTParty::UnsupportedFormat,
      URI::InvalidURIError, SocketError
    return nil
  end

  # Initialize the temporary hash
  type = Hash.new

  # Parse the document and append to the temporary hash
  doc.css('meta').each do |meta|
    if !meta.attribute('property').nil? && meta.attribute('property').to_s.match(/^og:(.+)$/i)
      type[$1.gsub('-','_')] = meta.attribute('content').to_s
    end
  end

  # None of the required attributes were found
  REQUIRED_ATTRIBUTES.each { |key| return nil if !type.has_key?(key) }

  # Return the representative OpenGraph object
  return OpenGraph::Object.new(type)
end